Why is Citi Bike so expensive?

Could you please elaborate on why the cost of using Citi Bike seems to be relatively high compared to other bike-sharing services? Are there specific factors contributing to this, such as maintenance costs, insurance premiums, or the need to cover operational expenses? Is there any transparency in how these costs are calculated and passed on to users? Additionally, are there any plans to review and potentially adjust pricing in the future to make Citi Bike more accessible and affordable for a wider range of people?